Slope illusion 13

Outdoor tilt illusion where an ascending slope appears to descend or a descending slope appear to ascend

e.g. Magnetic Hill in Canada; Wikipedia

since August 15, 2013

A survey of the slope-ascending water in Tsunan-twon, Niigata-prefecture, Japan

August 14, 2013, reported by Akiyoshi Kitaoka and Seiichi Tsuinashi, supported by a JSPS kaken-hi grant and R-GIRO

Copyright Akiyoshi Kitaoka 2013 (August 15) photo August 14, 2013

Along the waterway, water flows upward though it appears to be the reversal.


The nearer side of the narrower waterway appears to be higher than the farther side, though the latter is higher than the former. Water flows from the right to the left.

Copyright Akiyoshi Kitaoka 2012 (November 7) photo November 5, 2012

Slope illusion 4


In this waterway, water goes out of the right block and flows to the curve.

Copyright Akiyoshi Kitaoka 2013 (April 4) photo April 4, 2013

Slope illusion 12

Seiichi's slope illusion pages

Slope illusion 12 (Slope-ascending water in Ujitawara-twon, Kyoto-prefecture, Japan)

Slope illusion 11 (Skewed staicase of the Shigaraki Ceramic Cultural Park, Shiga, Japan)

Slope illusion 10 (Skewed staicase of Shomaru railway station, Saitama, Japan)

Slope illusion 9 (Illusory slope in Minamitane-town, Tanegashima-island, Kagoshima, Japan)

Slope illusion 8 (Illusory slope in Nakatane-town, Tanegashima-island, Kagoshima, Japan)

Slope illusion 7 (Danjo-zaka and Okyo-zaka in Amakusa-Shimojima, Kumamoto, Japan)

Slope illusion 6 (Slope-ascending river in Miyama, Nantan, Kyoto, Japan)

Slope illusion 5 (Ghost slope in Okagaki, Onga-county, Fukuoka, Japan)

Slope illusion 4 (Slope-ascending water in Tanushimaru, Kurume, Fukuoka, Japan)

Slope illusion 3 (moving-back slope in Hashikami, Aomori, Japan)

Slope illusion 2 (Mysterious slope in Towa, Iwate, Japan)

Slope illusion 1 (Mystery zone in Yashima, Takamatsu, Kagawa, Japan, etc.)

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